AstroAlert is your personal sky-watch assistant. It tells you exactly which satellites, planets, comets, and deep-sky objects will pass right above your location in the next 24 hours — including spectacular zenith events above 70°. Powered by NASA/JPL data, it combines real-time calculations with educational content, a full astronomy glossary, and detailed object sheets. The sky above you, revealed with precision.
🚀 Hello Product Hunt!
I’m thrilled to introduce AstroAlert — a project I built because I always missed spectacular satellite passes without knowing they were happening above me.
AstroAlert calculates all major sky events for your exact location: satellites, planets, comets and even deep-sky objects.
I’d love your feedback: what celestial object would YOU like to track next?
Happy to answer every question! ✨
